Ubuntu 23.10 & 22.04 LTS USN-6651-1 Critical: Kernel Issues

ubuntu

February 26, 2024

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-laptop: Linux kernel for Lenovo X13s ARM laptops

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-starfive: Linux kernel for StarFive processors

- linux-hwe-6.5: Linux hardware enablement (HWE) kernel

Details:

It was discovered that a race condition existed in the ATM (Asynchronous

Transfer Mode) subsystem of the Linux kernel, leading to a use-after-free

vulnerability. A local attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2023-51780)

It was discovered that a race condition existed in the AppleTalk networking

subsystem of the Linux kernel, leading to a use-after-free vulnerability. A

local attacke...

Read the Full Advisory

Topics Covered

security advisory denial of service code execution security fix kernel ubuntu system crash

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.10:
   linux-image-6.5.0-1008-starfive  6.5.0-1008.9
   linux-image-6.5.0-1010-laptop   6.5.0-1010.13
   linux-image-6.5.0-1011-raspi    6.5.0-1011.14
   linux-image-6.5.0-1014-aws      6.5.0-1014.14
   linux-image-6.5.0-1014-gcp      6.5.0-1014.14
   linux-image-6.5.0-1016-oracle   6.5.0-1016.16
   linux-image-6.5.0-21-generic    6.5.0-21.21
   linux-image-6.5.0-21-generic-64k  6.5.0-21.21
   linux-image-aws                 6.5.0.1014.14
   linux-image-gcp                 6.5.0.1014.14
   linux-image-generic             6.5.0.21.20
   linux-image-generic-64k         6.5.0.21.20
   linux-image-generic-lpae        6.5.0.21.20
   linux-image-kvm                 6.5.0.21.20
   linux-image-laptop-23.10        6.5.0.1010.13
   linux-image-oracle              6.5.0.1016.16
   linux-image-raspi               6.5.0.1011.12
   linux-image-raspi-nolpae        6.5.0.1011.12
   linux-image-starfive            6.5.0.1008.10
   linux-image-virtual             6.5.0.21.20

Ubuntu 22.04 LTS:
   linux-image-6.5.0-21-generic    6.5.0-21.21~22.04.1
   linux-image-6.5.0-21-generic-64k  6.5.0-21.21~22.04.1
   linux-image-generic-64k-hwe-22.04  6.5.0.21.21~22.04.11
   linux-image-generic-hwe-22.04   6.5.0.21.21~22.04.11
   linux-image-virtual-hwe-22.04   6.5.0.21.21~22.04.11

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.